according to newton's 3rd law every action has an equal and opposite reaction .but when we hit a heavy stone towards the walls .it didn't gives the equal reaction and come back very slowly?why...
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No, because the "action" and "reaction" forces are not acting on the same thing. Newton's Third Law says, roughly, that if object A pushes on object B, then B must also push back on A. More concretely, if I push a book along a tabletop, the book pushes back on my hand (which you can feel). These forces do not cancel out, because one is a force on the book, and the other is a force on my hand. It is the net force on any given object that controls its motion.
hamza34:
no. when we hit the stone it destroy the wall a bit . because of which there lose of energy occurs and rest of the energy pushes the stone back
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